d8223ffa75
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
(cherry picked from commit c7bc44d5ad)
434 lines
10 KiB
C++
434 lines
10 KiB
C++
/*************************************************************************/
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/* memory_pool_static_malloc.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "memory_pool_static_malloc.h"
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#include "error_macros.h"
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#include "os/memory.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include "os/copymem.h"
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#include "os/os.h"
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/**
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* NOTE NOTE NOTE NOTE
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* in debug mode, this prepends the memory size to the allocated block
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* so BE CAREFUL!
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*/
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void* MemoryPoolStaticMalloc::alloc(size_t p_bytes,const char *p_description) {
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#if DEFAULT_ALIGNMENT == 1
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return _alloc(p_bytes, p_description);
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#else
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size_t total;
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#if defined(_add_overflow)
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if (_add_overflow(p_bytes, DEFAULT_ALIGNMENT, &total)) return NULL;
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#else
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total = p_bytes + DEFAULT_ALIGNMENT;
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#endif
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uint8_t* ptr = (uint8_t*)_alloc(total, p_description);
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ERR_FAIL_COND_V( !ptr, ptr );
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int ofs = (DEFAULT_ALIGNMENT - ((uintptr_t)ptr & (DEFAULT_ALIGNMENT - 1)));
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ptr[ofs-1] = ofs;
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return (void*)(ptr + ofs);
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#endif
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};
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void* MemoryPoolStaticMalloc::_alloc(size_t p_bytes,const char *p_description) {
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ERR_FAIL_COND_V(p_bytes==0,0);
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MutexLock lock(mutex);
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#ifdef DEBUG_MEMORY_ENABLED
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size_t total;
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#if defined(_add_overflow)
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if (_add_overflow(p_bytes, sizeof(RingPtr), &total)) return NULL;
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#else
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total = p_bytes + sizeof(RingPtr);
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#endif
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void *mem=malloc(total); /// add for size and ringlist
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if (!mem) {
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printf("**ERROR: out of memory while allocating %lu bytes by %s?\n", (unsigned long) p_bytes, p_description);
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printf("**ERROR: memory usage is %lu\n", (unsigned long) get_total_usage());
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};
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ERR_FAIL_COND_V(!mem,0); //out of memory, or unreasonable request
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/* setup the ringlist element */
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RingPtr *ringptr = (RingPtr*)mem;
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/* setup the ringlist element data (description and size ) */
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ringptr->size = p_bytes;
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ringptr->descr=p_description;
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if (ringlist) { /* existing ringlist */
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/* assign next */
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ringptr->next = ringlist->next;
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ringlist->next = ringptr;
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/* assign prev */
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ringptr->prev = ringlist;
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ringptr->next->prev = ringptr;
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} else { /* non existing ringlist */
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ringptr->next=ringptr;
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ringptr->prev=ringptr;
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ringlist=ringptr;
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}
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total_mem+=p_bytes;
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/* update statistics */
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if (total_mem > max_mem )
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max_mem = total_mem;
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total_pointers++;
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if (total_pointers > max_pointers)
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max_pointers=total_pointers;
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return ringptr + 1; /* return memory after ringptr */
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#else
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void *mem=malloc(p_bytes);
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ERR_FAIL_COND_V(!mem,0); //out of memory, or unreasonable request
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return mem;
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#endif
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}
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void* MemoryPoolStaticMalloc::realloc(void *p_memory,size_t p_bytes) {
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#if DEFAULT_ALIGNMENT == 1
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return _realloc(p_memory,p_bytes);
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#else
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if (!p_memory)
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return alloc(p_bytes);
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size_t total;
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#if defined(_add_overflow)
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if (_add_overflow(p_bytes, DEFAULT_ALIGNMENT, &total)) return NULL;
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#else
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total = p_bytes + DEFAULT_ALIGNMENT;
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#endif
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uint8_t* mem = (uint8_t*)p_memory;
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int ofs = *(mem-1);
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mem = mem - ofs;
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uint8_t* ptr = (uint8_t*)_realloc(mem, total);
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ERR_FAIL_COND_V(ptr == NULL, NULL);
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int new_ofs = (DEFAULT_ALIGNMENT - ((uintptr_t)ptr & (DEFAULT_ALIGNMENT - 1)));
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if (new_ofs != ofs) {
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//printf("realloc moving %i bytes\n", p_bytes);
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movemem((ptr + new_ofs), (ptr + ofs), p_bytes);
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ptr[new_ofs-1] = new_ofs;
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};
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return ptr + new_ofs;
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#endif
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};
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void* MemoryPoolStaticMalloc::_realloc(void *p_memory,size_t p_bytes) {
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if (p_memory==NULL) {
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return alloc( p_bytes );
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}
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if (p_bytes==0) {
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this->free(p_memory);
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ERR_FAIL_COND_V( p_bytes < 0 , NULL );
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return NULL;
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}
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MutexLock lock(mutex);
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#ifdef DEBUG_MEMORY_ENABLED
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RingPtr *ringptr = (RingPtr*)p_memory;
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ringptr--; /* go back an element to find the tingptr */
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bool single_element = (ringptr->next == ringptr) && (ringptr->prev == ringptr);
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bool is_list = ( ringlist == ringptr );
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RingPtr *new_ringptr=(RingPtr*)::realloc(ringptr, p_bytes+sizeof(RingPtr));
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ERR_FAIL_COND_V( new_ringptr == 0, NULL ); /// reallocation failed
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/* actualize mem used */
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total_mem -= new_ringptr->size;
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new_ringptr->size = p_bytes;
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total_mem += new_ringptr->size;
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if (total_mem > max_mem ) //update statistics
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max_mem = total_mem;
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if (new_ringptr == ringptr )
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return ringptr + 1; // block didn't move, don't do anything
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if (single_element) {
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new_ringptr->next=new_ringptr;
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new_ringptr->prev=new_ringptr;
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} else {
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new_ringptr->next->prev=new_ringptr;
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new_ringptr->prev->next=new_ringptr;
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}
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if (is_list)
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ringlist=new_ringptr;
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return new_ringptr + 1;
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#else
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return ::realloc( p_memory, p_bytes );
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#endif
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}
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void MemoryPoolStaticMalloc::free(void *p_ptr) {
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ERR_FAIL_COND( !MemoryPoolStatic::get_singleton());
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#if DEFAULT_ALIGNMENT == 1
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_free(p_ptr);
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#else
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uint8_t* mem = (uint8_t*)p_ptr;
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int ofs = *(mem-1);
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mem = mem - ofs;
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_free(mem);
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#endif
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};
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void MemoryPoolStaticMalloc::_free(void *p_ptr) {
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MutexLock lock(mutex);
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#ifdef DEBUG_MEMORY_ENABLED
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if (p_ptr==0) {
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printf("**ERROR: STATIC ALLOC: Attempted free of NULL pointer.\n");
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return;
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};
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RingPtr *ringptr = (RingPtr*)p_ptr;
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ringptr--; /* go back an element to find the ringptr */
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#if 0
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{ // check for existing memory on free.
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RingPtr *p = ringlist;
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bool found=false;
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if (ringlist) {
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do {
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if (p==ringptr) {
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found=true;
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break;
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}
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p=p->next;
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} while (p!=ringlist);
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}
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if (!found) {
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printf("**ERROR: STATIC ALLOC: Attempted free of unknown pointer at %p\n",(ringptr+1));
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return;
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}
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}
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#endif
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/* proceed to erase */
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bool single_element = (ringptr->next == ringptr) && (ringptr->prev == ringptr);
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bool is_list = ( ringlist == ringptr );
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if (single_element) {
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/* just get rid of it */
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ringlist=0;
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} else {
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/* auto-remove from ringlist */
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if (is_list)
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ringlist=ringptr->next;
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ringptr->prev->next = ringptr->next;
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ringptr->next->prev = ringptr->prev;
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}
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total_mem -= ringptr->size;
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total_pointers--;
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// catch more errors
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zeromem(ringptr,sizeof(RingPtr)+ringptr->size);
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::free(ringptr); //just free that pointer
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#else
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ERR_FAIL_COND(p_ptr==0);
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::free(p_ptr);
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#endif
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}
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size_t MemoryPoolStaticMalloc::get_available_mem() const {
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return 0xffffffff;
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}
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size_t MemoryPoolStaticMalloc::get_total_usage() {
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#ifdef DEBUG_MEMORY_ENABLED
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return total_mem;
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#else
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return 0;
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#endif
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}
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size_t MemoryPoolStaticMalloc::get_max_usage() {
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return max_mem;
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}
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/* Most likely available only if memory debugger was compiled in */
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int MemoryPoolStaticMalloc::get_alloc_count() {
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return total_pointers;
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}
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void * MemoryPoolStaticMalloc::get_alloc_ptr(int p_alloc_idx) {
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return 0;
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}
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const char* MemoryPoolStaticMalloc::get_alloc_description(int p_alloc_idx) {
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return "";
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}
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size_t MemoryPoolStaticMalloc::get_alloc_size(int p_alloc_idx) {
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return 0;
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}
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void MemoryPoolStaticMalloc::dump_mem_to_file(const char* p_file) {
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#ifdef DEBUG_MEMORY_ENABLED
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ERR_FAIL_COND( !ringlist ); /** WTF BUG !? */
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RingPtr *p = ringlist;
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FILE *f = fopen(p_file,"wb");
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do {
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fprintf(f,"%p-%i-%s\n", p+1, (int)p->size, (p->descr?p->descr:"") );
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p=p->next;
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} while (p!=ringlist);
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fclose(f);
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#endif
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}
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MemoryPoolStaticMalloc::MemoryPoolStaticMalloc() {
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#ifdef DEBUG_MEMORY_ENABLED
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total_mem=0;
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total_pointers=0;
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ringlist=0;
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max_mem=0;
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max_pointers=0;
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#endif
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mutex=NULL;
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#ifndef NO_THREADS
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mutex=Mutex::create(); // at this point, this should work
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#endif
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}
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MemoryPoolStaticMalloc::~MemoryPoolStaticMalloc() {
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Mutex *old_mutex=mutex;
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mutex=NULL;
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if (old_mutex)
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memdelete(old_mutex);
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#ifdef DEBUG_MEMORY_ENABLED
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if (OS::get_singleton()->is_stdout_verbose()) {
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if (total_mem > 0 ) {
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printf("**ERROR: STATIC ALLOC: ** MEMORY LEAKS DETECTED **\n");
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printf("**ERROR: STATIC ALLOC: %i bytes of memory in use at exit.\n",(int)total_mem);
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if (1){
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printf("**ERROR: STATIC ALLOC: Following is the list of leaked allocations: \n");
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ERR_FAIL_COND( !ringlist ); /** WTF BUG !? */
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RingPtr *p = ringlist;
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do {
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printf("\t%p - %i bytes - %s\n", (RingPtr*)(p+1), (int)p->size, (p->descr?p->descr:"") );
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p=p->next;
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} while (p!=ringlist);
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printf("**ERROR: STATIC ALLOC: End of Report.\n");
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};
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printf("mem - max %i, pointers %i, leaks %i.\n",(int)max_mem,max_pointers,(int)total_mem);
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} else {
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printf("INFO: mem - max %i, pointers %i, no leaks.\n",(int)max_mem,max_pointers);
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}
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}
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#endif
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}
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